get
This represent the original iOS INDIVIDUAL direction type which they described like this:
Ahead, Right, Behind, and Left all get a 90 degree window centered in their respective directions (e.g. right is from 45 degrees to 135 degrees). These windows do not overlap, so relative directions can only be "ahead", "to the right", "behind", or "to the left".
Return
an array of Segments describing the angles
Parameters
heading
Direction the device is pointing in degrees